shindig.IfrGadget.getMainContent = function(continuation) {
    var iframeId = this.getIframeId();
    gadgets.rpc.setRelayUrl(iframeId, this.serverBase_ + this.rpcRelay);
    gadgets.rpc.setAuthToken(iframeId, this.rpcToken);
    continuation(
        '<div class="' + this.cssClassGadgetContent + '"><iframe id="' + iframeId + '" name="' + iframeId +
        '" class="' + this.cssClassGadget + '" src="about:blank' + '" frameborder="no" scrolling="' +
        (this.scrolling ? 'auto' : 'no') + '"' + (this.height ? ' height="' + this.height + '"' : '') +
        (this.width ? ' width="' + this.width + '"' : '') + '></iframe></div>'
    );
};
